645460637134 has 8 divisors (see below), whose sum is σ = 975156358680. Its totient is φ = 320408517576.

The previous prime is 645460637099. The next prime is 645460637147. The reversal of 645460637134 is 431736064546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1160900149 + ... + 1160900704.

It is an arithmetic number, because the mean of its divisors is an integer number (121894544835).

Almost surely, 2^645460637134 is an apocalyptic number.

645460637134 is a deficient number, since it is larger than the sum of its proper divisors (329695721546).

645460637134 is a wasteful number, since it uses less digits than its factorization.

645460637134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321800994.

The product of its (nonzero) digits is 4354560, while the sum is 49.

The spelling of 645460637134 in words is "six hundred forty-five billion, four hundred sixty million, six hundred thirty-seven thousand, one hundred thirty-four".